Marko blames Renault for lack of downforce on RB15

The row between Red Bull Racing and Renault is still going on now, even with the pair not working together anymore!

Red Bull technical consultant Dr Helmut Marko believes the reason his team are struggling with the downward pressure side of things this season, is because Renault had to make an aerodynamic compromise in the past because of its poor engine.

Nowadays, Red Bull's strengths perhaps aren't in the circuit's corners, but more straight-line speed thanks to its new engine supplier, Honda.

"Until now, missing downward pressure has been a problem for us this season," Marko said ahead of the Spanish Grand Prix on Sunday. "The aerodynamic design was always as efficient as possible, with the least possible inconvenience from air resistance.

Red Bull are bringing an aerodynamic upgrade to Barcelona, and Marko has described his team as "putting all cards on the table" for this weekend's race: "Honda has significantly improved engine performance.